Disc brake pad and disc brake fitted with such a pad

Abstract

The subject of the invention is a disc brake pad and a brake including such a pad. The disc brake pad (10) comprises two opposite sides (16, 18) including projections (24, 26) in which notches (28, 30) are formed, formed by a first part (32) and a second part (34) forming an acute angle (A) between them. The profile of the opposite sides (16, 18) is such that, for any point (P) of the second part (34), the distance between said point (P) and any part of the opposite side (16, 18), except the region of the notch (28, 30), is greater than a value (R) corresponding to the distance separating the apices of said two notches (28, 30) plus a predetermined value. The required profile of the sides is obtained by means of a portion (44) connecting said second part (34) and the corresponding side (16, 18) of the pad (10). Application to motor vehicle braking.

We claim: 
     
       1. A disc brake pad including a pad-holder plate on which a friction pad is fixed and which can be mounted to support projections of a disc brake assembly and retained in the assembly by way of removable key means, comprising a substantially rectangular pad-holder plate having a first pair or sides which are substantially parallel and circumferentially spaced apart and a second pair of sides which are substantially parallel and radially spaced apart, each of the sides of the first pair having a notch therein comprising a first part substantially parallel to said sides of the second pair and a second part disposed at an acute angle with said first part characterized in that the profile of said sides of the first pair and the support projections provide for rotatable mounting of the pad and plate as the pad and plate are placed in operaable position between the support projections, in that at any point along the length of said second part the distance between said point and any point on the circumferentially opposide side of said first pair, other than the region of the associated notch, is greater than the distance separating the apices of the two notches plus a predetermined value, whereby the plate and friction pad are mounted to the support projections by engaging one notch with a support projection and rotating the plate thereabout so that the other notch receives the other suport projection prior to introduction of said removable key means into the other notch. 
     
     
       2. The disc brake pad according to claim 1, characterized in that each side of the first pair has a plate projection in which said notch is formed. 
     
     
       3. The disc brake pad and plate according to claim 2, characterized in that each of said plate projections has a plate end portion circumferentially disposed apart from the apex of the associated notch and connected to the associated side of said first pair of sides by means of a straight portion. 
     
     
       4. The disc brake pad and plate according to any one of the preceding claims, wherein a torque support includes the support projections which are circumferentially spaced apart for supporting said pad, characterized in that said support projections have a profile complementary with the profile of said notches and that the circumferential distance between the apices of the support projections corresponds to the distance separating the apices of the two notches plus said predetermined value. 
     
     
       5. The disc brake pad and plate according to claim 4, characterized in that the other of said support projections of said torque support is shaped complementary to said removable key means which is axially removable.